I have Bosch 860's as primaries and 1680's as secondaries;

They're low impedance injectors - as far as i can tell (from the tech manual and searching on the wolf-forum) it will drive them without problems and without the resistors inline.

can anyone else confirm this?

 

i had to run resistors on my 1680's but i think im running stock 550's which were high imp and i had to make them the same?

 

I confirmed what I thoguht with RX7STORE - no need for resistors when using Wolf4 and low impedance;